More than 3,000 furnishings and accessories from the Lanesborough hotel in London will hit the auction block starting December 9 in a five-day sale led by Pro Auction, based in Bath, England. The offerings include custom carpentry, original Georgian and Regency-era oil paintings, and mahogany furniture, dating to the 18th and 19th centuries. The furniture and accessories were part of the hotel’s 93 guest rooms, restaurant, and bar, including the U-shaped mahogany bar counter—which is carved with reliefs and fe…